Reddit's Try Not To Laugh Challenge [ORIGINAL]

Subscribe! I might just make more. ;D Your support so far has been amazing. :)
Articles have been written about this video! That's just blowing my mind.

Here is a list of where this video has been featured:

https://ca.news.yahoo.com/blogs/daily-buzz/try-to-watch-this-video-without-laughing-163040885.html
http://www.bositum.com/video/wtf/redditor-launched-his-try-not-to-laugh-challenge-you-just-cannot-win.html
http://www.blokeslife.com/videos/7-minute-laugh-challenge
http://www.dailydot.com/lol/reddit-try-not-to-laugh-challenge/
http://www.sobadsogood.com/2015/06/18/reddits-ultimate-challange-try-not-laugh-during-video/
http://www.kupdates.com/viral/reddits-try-not-laugh-challenge-youtube-video/
http://www.lostateminor.com/2015/06/18/take-reddits-try-not-to-laugh-challenge-in-7-minutes/
http://www.hellou.co.uk/2015/06/can-watch-video-without-laughing-49274/
http://www.sickchirpse.com/reddit-try-not-to-laugh-challenge-video/
http://www.brobible.com/life/article/try-not-to-laugh-video/
http://www.fhm.com/news/can-you-beat-reddits-try-not-to-laugh-challenge
(Is your article not here? Send me a PM!)

I'll admit, the 9/11-joke is in poor-taste, but understand that many find that sort of humor funny. Likely because they distance themselves from the tragedy of the event and use humor to cope. It's included for two reasons. It was one of the most upvoted clips in the thread, and this is a video covering the most upvoted clips in the thread (1+1=2). Secondly, I did not think this video would go viral like this, so I did not think about preparing this video for a large audience.
I'm sorry if it's inclusion offends you.

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Original description from June 14:

If you didn't make it, comment which clip made you 'lose it'. :)

I'm way too lazy to link all 53 clips, so here is the thread in which you can find almost all of them:
http://www.reddit.com/r/AskReddit/comments/39pivj/whats_your_favorite_video_that_is_10_seconds_or/

Only clip I didn't take from there is the puppy-clip at 4:55. That is a home video that my sister recorded. I have uploaded the clip here: https://youtu.be/993XgXlMXwo

Видео Reddit's Try Not To Laugh Challenge [ORIGINAL] канала Fraxinus Excelsior